... profile Grade6000 SeriesTemperT3--T8Brand NameAlustarSurface treatmentmill finish, anodizing,powder coated, sandblasting,electrophoresis etcdeep processingcutting,drilling,punching, ... itself,with a natural anodic layer formed in the air,week corrosion resistanceAnodizingThrough an eletrical ... anodic layer on the surface of profile,available in different colors,including silver,champagne,dark bronze, ...